Display Screen Charging Time Compensation for Grayscale Accuracy
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Solution Overview
Problem
Display screens often fail to reach desired target grayscale values, resulting in poor display effects due to inconsistent charging rates across different areas, leading to inadequate charging in areas farther from the data voltage input terminal.
Innovation Solution
A compensation method that adjusts charging times for display screen areas based on their distance from the data voltage input terminal and uses a grayscale compensation parameter table to adjust grayscale values for sub-pixels, ensuring consistent charging rates and accurate grayscale representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the display screen uses a uniform charging time for all areas, then the device complexity is reduced, but the manufacturing precision deteriorates due to inconsistent charging rates across different areas
Solution Approach 1:
The patent divides the display screen into multiple areas with different charging times based on their distance from the data voltage input terminal. Areas farther from the input terminal receive longer charging times to compensate for voltage drops, ensuring uniform charging rates across all regions while maintaining grayscale accuracy without requiring complex global control mechanisms
2Manufacturing precision
If the display screen increases the charging time for areas farther from the data voltage input terminal, then the manufacturing precision is improved, but the loss of time increases due to extended charging duration
Solution Approach 1:
The patent applies different charging times only to specific areas that require compensation, rather than extending the charging time for the entire display screen. Areas closer to the data voltage input terminal maintain their original charging time, while only distant areas receive extended charging, thus achieving grayscale accuracy improvement without proportionally increasing overall charging time
3Device complexity
If the display screen uses a simple charging mechanism without compensation, then the device complexity is reduced, but the reliability deteriorates due to inconsistent charging rates causing poor display effects
Solution Approach 1:
The patent introduces a simple area-based charging time adjustment mechanism that divides the display into regions with different charging requirements. This local differentiation approach improves display reliability by ensuring consistent charging rates across all areas without requiring complex compensation algorithms or additional hardware components
Data Source
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AI summary
The present disclosure provides a compensation method and compensation device for a display screen, and a display device. The compensation method includes: adjusting a charging time for a plurality of areas of the display screen so that the charging time for each area to be charged is positively related to a distance from the each area to a data voltage input terminal of the display screen; comparing a first grayscale value before compensation of a sub-pixel in an i-th row and j-th column with a second grayscale value input to a sub-pixel in an (i-1)-th row and j-th column, where i and j are both positive integers, and i>1; searching a grayscale compensation parameter corresponding to the first grayscale value and the second grayscale value from a grayscale compensation parameter table in a case where the first grayscale value is not equal to the second grayscale value; compensating the first grayscale value by the grayscale compensation parameter to obtain a third grayscale value; and inputting the third grayscale value to the sub-pixel in the i-th row and j-th column for display. In the present disclosure, it is possible to allow that the display screen when displaying an image may reach a desired target grayscale value, thereby improving the display effect.